Product 12

A Burst 3 Fire Machine Gun and R DPS who raises her own ATK after sustained fire and deals area damage with Skill 2 and Burst.
She is not a core pick in Story, bosses, or Raids.
Given her R rarity and weak skill multipliers, she's barely worth investing in.

After 200 normal attack rounds, her own ATK rises briefly, and Skill 2 targets the single enemy with the lowest HP for damage. Her Burst deals heavy damage to enemies within her attack range.

Keep firing to trigger Action: Increase ATK1 on the 200 normal attack condition.
Use Skill 2 and Burst to damage enemies in range.
Auto is enough by default.

There is little evidence of combos used together in the same squad in the recent meta.

To keep Machine Gun fire going, cover Reload with the Resilience Cube and Bastion Cube. If Hit Rate is lacking, use the Assault Cube. If the cube level gap is large, use the higher-level Harmony Cube regardless of ranking.

As an R DPS, she's not worth Overload investment. If you use her, focus on Elemental Advantage and ATK; Max Ammo lines are low priority.

She isn't a meta core pick, so you rarely spend skill books on her. Only if you must, raise Action: Precision StrikeB to 4; Action: Increase ATK1 and Action: Focus Fire2 are low priority.

She doesn't appear in top Solo Raid lineups. Use her only as temporary DPS early on when your roster is short.

Machine Gun sustained fire can meet her Skill 1 condition.
Skill 2 can focus fire on the single enemy with the lowest HP.
Her Burst damages multiple enemies within her attack range.

Skill 1 requires 200 rounds, so her ATK buff kicks in late.
Her skill multipliers are low, so her late-game damage falls short.
She isn't a core pick in the Burst 3 main DPS slot.